Reddit: Hash-Collision Denial-of-Service Vulnerability in Markdown Parser

Summary: We have found three bugs in Reddit's markdown parser. Two of these bugs are exploitable to launch an algorithmic complexity denial-of-service DoS attack. In this report we explain the bugs and exploits. We also show, in a non-disruptive way, that it appears to exist in the current versio...

cyrus-imapd: Denial of service via string hashing algorithm collisions

A flaw was found in cyrus-imapd. A bad string hashing algorithm used in internal hash tables allows user inputs to be stored in predictable buckets. A user may cause a CPU denial of service by maliciously directing many inputs to a single bucket. The highest threat from this vulnerability is to...

Oracle Linux 8 : cyrus-imapd (ELSA-2021-3492)

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2021-3492 advisory. 3.0.7-20.1 - Fix for CVE-2021-33582 Tenable has extracted the preceding description block directly from the Oracle Linux security advisory. Note that Nessus has...

FreeBSD : cyrus-imapd -- multiple-minute daemon hang via input that is mishandled during hash-table interaction (3d915d96-0b1f-11ec-8d9f-080027415d17)

Cyrus IMAP 3.4.2 Release Notes states : Fixed CVE-2021-33582: Certain user inputs are used as hash table keys during processing. A poorly chosen string hashing algorithm meant that the user could control which bucket their data was stored in, allowing a malicious user to direct many inputs to a...

Denial Of Service (DoS)

Cyrus IMAP is vulnerble to denial of service. It allows remote attackers to cause a denial of service multiple-minute daemon hang via input that is mishandled during hash-table interaction. Because there are many insertions into a single bucket, strcmp becomes slow...

Cyrus IMAP < 3.0.16, 3.2.x < 3.2.8, 3.4.x < 3.4.2 DoS Vulnerability

Cyrus IMAP is prone to a denial of service DoS vulnerability. Copyright C 2021 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software;...

DEBIAN-CVE-2021-33582

Cyrus IMAP before 3.4.2 allows remote attackers to cause a denial of service multiple-minute daemon hang via input that is mishandled during hash-table interaction. Because there are many insertions into a single bucket, strcmp becomes slow. This is fixed in 3.4.2, 3.2.8, and 3.0.16...

CVE-2021-33582

Cyrus IMAP before 3.4.2 allows remote attackers to cause a denial of service multiple-minute daemon hang via input that is mishandled during hash-table interaction. Because there are many insertions into a single bucket, strcmp becomes slow. This is fixed in 3.4.2, 3.2.8, and 3.0.16...

CVE-2021-33582

Cyrus IMAP before 3.4.2 allows remote attackers to cause a denial of service multiple-minute daemon hang via input that is mishandled during hash-table interaction. Because there are many insertions into a single bucket, strcmp becomes slow. This is fixed in 3.4.2, 3.2.8, and 3.0.16...

CVE-2021-33582

Cyrus IMAP before 3.4.2 allows remote attackers to cause a denial of service multiple-minute daemon hang via input that is mishandled during hash-table interaction. Because there are many insertions into a single bucket, strcmp becomes slow. This is fixed in 3.4.2, 3.2.8, and 3.0.16...

UBUNTU-CVE-2021-33582

Cyrus IMAP before 3.4.2 allows remote attackers to cause a denial of service multiple-minute daemon hang via input that is mishandled during hash-table interaction. Because there are many insertions into a single bucket, strcmp becomes slow. This is fixed in 3.4.2, 3.2.8, and 3.0.16...

CVE-2021-37220

MuPDF through 1.18.1 has an out-of-bounds write because the cached color converter does not properly consider the maximum key size of a hash table. This can, for example, be seen with crafted "mutool draw" input...

CVE-2021-37220

MuPDF through 1.18.1 has an out-of-bounds write because the cached color converter does not properly consider the maximum key size of a hash table. This can, for example, be seen with crafted "mutool draw" input...

Out-of-bounds

MuPDF through 1.18.1 has an out-of-bounds write because the cached color converter does not properly consider the maximum key size of a hash table. This can, for example, be seen with crafted "mutool draw" input...

CVE-2021-37220

MuPDF through 1.18.1 has an out-of-bounds write because the cached color converter does not properly consider the maximum key size of a hash table. This can, for example, be seen with crafted "mutool draw" input...

CVE-2021-37220

MuPDF through 1.18.1 has an out-of-bounds write because the cached color converter does not properly consider the maximum key size of a hash table. This can, for example, be seen with crafted "mutool draw" input...

CVE-2021-37220

MuPDF through 1.18.1 has an out-of-bounds write because the cached color converter does not properly consider the maximum key size of a hash table. This can, for example, be seen with crafted "mutool draw" input...

CVE-2021-37220

MuPDF through 1.18.1 has an out-of-bounds write because the cached color converter does not properly consider the maximum key size of a hash table. This can, for example, be seen with crafted "mutool draw" input...

CVE-2021-37220

MuPDF through 1.18.1 has an out-of-bounds write because the cached color converter does not properly consider the maximum key size of a hash table. This can, for example, be seen with crafted "mutool draw" input...

MuPDF 缓冲区错误漏洞

Artifex Software MuPDF is a free, lightweight PDF reader from Artifex Software, USA. A buffer error vulnerability exists in MuPDF, which stems from a color converter in the product's buffer that does not properly take into account the size of the hash table's maximum key, and can be exploited by ...